Need a rim recommendation for SS

Hi,
I have an older frame that I've converted (in process of) making a SS. The rear rim needs replacing so I'm looking for some recommendations for a strong rear rim that is a rim brake. To give an idea of what I normally ride...I run Stan's Flows on my other bike. I'm pretty rough on wheels (220lbs) but the flows have held up great.

Any recommendations greatly appreciated - obviously with the age of the bike I don't want to spend $300 for a rim so cost is a factor.